By
1st rd
Naomi Osaka (JPN) bt Johanna Larsson (SWE) 6-7 (4/7), 6-4, 6-2
Kateryna Bondarenko (UKR) bt Evgeniya Rodina (RUS) 6-4, 7-5
Jelena Ostapenko (LAT) bt Ana Bogdan (ROM) 6-4, 6-2
Andrea Petkovic (GER) bt Lara Arruabarrena (ESP) 7-5, 6-2
Ons Jabeur (TUN) bt Marina Erakovic (NZL) 6-4, 6-1
Monica Puig (PUR) bt Katerina Siniakova (CZE x16) 4-6, 6-2, 4-1 retired
Alison Riske (USA) bt Kayla Day (USA) 7-5, 4-6, 6-0